Lipophilic drugs in plasma

Lipophilic drugs in plasma refers to a broad classification of pharmacological agents characterized by high lipid solubility and low aqueous solubility. In the systemic circulation, these molecules are predominantly bound to plasma proteins such as human serum albumin (for acidic drugs) or alpha-1-acid glycoprotein (for basic drugs), or they are transported within lipoproteins (StatPearls, 2023). Their high partition coefficient (logP) allows them to readily cross biological membranes, including the blood-brain barrier, which often results in a high volume of distribution and significant sequestration in adipose tissues (PubMed, PMC5394508). This pharmacokinetic profile leads to prolonged elimination half-lives and a risk of drug accumulation, particularly with chronic dosing. Clinical management of these drugs requires careful consideration of protein-binding displacement and the patient's body composition, as these factors significantly influence the free, pharmacologically active fraction of the drug in the plasma (NIH, 2022). This term does not describe a single molecular target but rather a physiological state and chemical property shared by many medications.

Other names

Lipophilic medicationsHydrophobic drugsLipid-soluble drugs

Not applicable; this term describes a pharmacokinetic state and chemical property of various drugs rather than a specific molecular target for drug action (StatPearls, 2023).